Bug 1016184 part 3a - Fix typos and minor style changes. r=ehsan

Also group the private section together, and remove the protect section
since TouchCaret is a MOZ_FINAL class.

layout/base/TouchCaret.cpp

@@ -125,7 +125,7 @@ TouchCaret::SetVisibility(bool aVisible)
   // Set touch caret expiration time.
   mVisible ? LaunchExpirationTimer() : CancelExpirationTimer();
 
-  // We must call SetHasTouchCaret() in order to get APZC to wait until the
+  // We must call SetMayHaveTouchCaret() in order to get APZC to wait until the
   // event has been round-tripped and check whether it has been handled,
   // otherwise B2G will end up panning the document when the user tries to drag
   // touch caret.
@@ -329,7 +329,7 @@ TouchCaret::IsOnTouchCaret(const nsPoint& aPoint)
 
 nsresult
 TouchCaret::NotifySelectionChanged(nsIDOMDocument* aDoc, nsISelection* aSel,
-                                     int16_t aReason)
+                                   int16_t aReason)
 {
   // Hide touch caret while no caret exists.
   nsCOMPtr<nsIPresShell> presShell = do_QueryReferent(mPresShell);

layout/base/TouchCaret.h

@@ -19,16 +19,13 @@
 namespace mozilla {
 
 /**
- * The TouchCaret places a touch caret according to caret postion when the
+ * The TouchCaret places a touch caret according to caret position when the
  * caret is shown.
  * TouchCaret is also responsible for touch caret visibility. Touch caret
  * won't be shown when timer expires or while key event causes selection change.
  */
 class TouchCaret MOZ_FINAL : public nsISelectionListener
 {
-private:
-  ~TouchCaret();
-
 public:
   explicit TouchCaret(nsIPresShell* aPresShell);
 
@@ -73,6 +70,8 @@ private:
   // Hide default constructor.
   TouchCaret() MOZ_DELETE;
 
+  ~TouchCaret();
+
   /**
    * Find the nsCanvasFrame which holds the touch caret.
    */
@@ -226,7 +225,6 @@ private:
     return sTouchCaretExpirationTime;
   }
 
-protected:
   nsWeakPtr mPresShell;
 
   // Touch caret visibility